Both China and U.S. agree the Kim regime should go. What they disagree on is who should dominate the post Kim North Korea. Kim doesn't care who dominates Korea after Kim goes, he only cares that Kim shouldn't go. So even though North Korea's propaganda is directed mostly at the U.S., north korea's nuclear weapons are directed equally at China and the U.S.
China doesn't have much of a leash on North Korea. China has zero interest in a nuclear armed North Korea, and couldn't stop North Korea going nuclear.
China doesn't have much of a leash on North Korea. China has zero interest in a nuclear armed North Korea, and couldn't stop North Korea going nuclear.